May 03, 2020
This course provides an introduction of some important concepts and tools on a very important aspect of data science: cleaning and organizing data before any analysis. A must for any data scientist.
Feb 02, 2016
Easy, mostly instructive Course. The Assignments and quizzes are quite good, and illustrates the lessons very well.\n\nSee the videos for general presentation, but use the energy on the excersizes.
By Luis E B P•
Jan 08, 2019
I think this course is really good, the instructors give you a lot of tools to handle data bases! I would recomend this course to any person that wants to learn about this.
Aug 26, 2017
Super useful, there are so many raw data in the practical world, which are needed to be cleaned, so that the analysts and other people can easily get information from data.
By Christopher R•
Feb 02, 2017
I use so much of what I've learned here on a day to day basis! Using the suite of functions from ggplot, dplyr, plyr and others has greatly reduced my data management time.
By Satish V•
Jul 22, 2018
This course was very useful, informative and interesting. However, I did feel that the course assignment seems to be, perhaps purposefully, but a bit unnecessarily vague.
By Sreemoyee M•
Jan 15, 2020
The challenging quizzes and assignments are a main reason why this course is so great! This course truly ensures that you truly understand and implement the videos.
By Jorge B S•
Aug 06, 2019
I have found this course very useful to gain a nice overview of the main tools to obtain and clean data. Moreover, for me it was challenging, which is always a plus.
By Diego T B•
Nov 07, 2017
Very interesting. Global view to process Data and try to explain with very useful techniques the processing or cleaning data with regular expressions. I enjoyed it!
By Johann R•
May 28, 2017
A great course in which many important concepts and techniques are covered. It also covers many handy tools/libraries that one can use to clean and manipulate data.
By Mauro S d S•
Mar 05, 2017
Very intense and covering a lot of material - After about an year from having the course and with a different understanding, this is probably the course to revisit.
By John J O G•
Jan 25, 2017
Muy buen curso y con buena evaluación de los temas mediante asignaciones varias con estudios en el mundo real que lo preparan para estar analizando trabajos reales
By Dany M•
Oct 24, 2017
Great course! I loved it. It's just informal enough and rigorous enough. The pace is enjoyable and the experience of the instructor carries well.
By Nimalka W•
Feb 13, 2019
Useful general course on tidying data and learning to import into R from various sources. Doesn't get into sequencing data import, but looks at other common ones
By Ayas S•
Nov 08, 2018
This course was very intense and not easy but over all, after doing all the work! Oh man I feel I have way more confidence in my R skills and Data understanding.
By Hatem K•
Dec 05, 2016
Excellent course. You will learn about concepts of 'clean' or tidy data and apply it in R. One of the most important, yet often ignored, aspects of data science.
By Kwun H N•
Dec 25, 2017
It is an excellent exercise to work on data cleaning and pre-processing. Also give me the great chance to read through the paper by Hadley Wickham on Tidy Data.
By Y S K•
Apr 23, 2017
This course gives an excellent introduction to the various data collection and tidying processes using R. This course is a must for any aspiring data scientist.
By Jihad R•
Nov 04, 2016
Great course! Very well structured and complete in the knowledge it brings both on the R language itself and in the concept of data clean up and transformation.
By Stefan L•
Mar 14, 2016
Interesting course with a lot of time intensive quizes. It, however, opened my eyes on how to effectively work towards clean data.
Thanks for the great courses!
By Yash G•
Aug 07, 2018
It was really an enriching course. I learnt a lot about the raw data formats and tools and techniques to get the best out of that raw data. Highly recommended
Apr 04, 2016
Very good course. By taking it you have the opportunity to build experience with R and get used with the main codes needed to perform a data cleaning process.
By Marely T R A•
Apr 22, 2020
Excellent course. A little bit difficult if your not used to handle matrices and vectors. Perhaps a review of the concept would be good to help new learners.
By Bhargava B•
Mar 29, 2018
This is a major basic skill to be acquired. The course does great job at introducing various methods and makes us practice with the quizzes and assignments.
Aug 26, 2018
its the best course for the data science students and it will help all the student who are going to join or who want to start their career in data science.
By Rizwan M•
Jul 06, 2018
good. however, volume of the video is very low, not audible without external speakers on some PCs. request to improvise. spoken language is also very fast.
By Michael M•
Aug 28, 2017
Another great course! I'm really glad there was so much support to help me get started on the class posts. PS, I think I'm in love with the ddply function.